I totally get why people don't want to be tracked, even on public roads, but the transportation engineering/urban planning part of me feels like the (anonymized) data would be FANTASTIC for transportation agencies who spend time/money on getting similar but less accurate data through surveys.
I considered trying to figure out if people could voluntarily submit their trip/GPS data (also anonymized) to agencies instead of the traditional survey but have little idea how to do that kind of stuff.